<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Learn CSS</title>
    <!-- 引入 Tailwind CSS -->
    <link href="https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css" rel="stylesheet">
</head>
<body>
    <div class="container mx-auto">
        <header class="bg-blue-900 text-white p-4">
            <h1 class="text-2xl">Welcome to Learn CSS</h1>
        </header>
        <nav class="bg-blue-800 text-white p-4">
            <ul class="flex space-x-4">
                <li><a href="#" class="hover:underline">Home</a></li>
                <li><a href="#" class="hover:underline">About</a></li>
                <li><a href="#" class="hover:underline">Services</a></li>
                <li><a href="#" class="hover:underline">Contact</a></li>
            </ul>
        </nav>
        <main class="flex h-screen">
            <aside class="w-1/4 bg-blue-300 text-white p-4">
                <h2 class="text-xl">Sidebar</h2>
                <p>Some sidebar content</p>
            </aside>
            <section class="w-3/4 text-white p-4">
                <h2 class="text-xl">Main Content</h2>
                <p>This is the main content area.</p>
            </section>
        </main>
    </div>
</body>
</html> 